Petrol Girls are an English punk rock band formed in London in 2012 by Ren Aldridge and Liepa Kuraitė, with Joe York and Zock Astpai joining later. The band is named after the historical Pétroleuses a
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f892baeba924937fe14a832551113f074be24c7bcb764783975413e170e9bac. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5669323b-a464-4b00-9864-8cced7ff7b56.json and https://artists.proofprofile.net/proofs/artist/5669323b-a464-4b00-9864-8cced7ff7b56.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e814188a019c08e4966b2c46bae28e3e2d3e45d1ec3db9cb0b18b226a28566. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBQLU1600017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x392a755a711fb31c5a24d49a23e7443007b7dd172bd0fa54e2223c4732c3de51. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBQLU1600022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x133a5e2ff6cafeb257a0dbe827f5b55c14390b8a02d9f861f0deedd7561d8b56. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBQLU1600023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14aafcf2c80f4ae1b78a7a1556a991f6d856c7007431804d2b7b95eba29d95dd. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBJSG1828701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x603cf7c2cff7d12ed61e1e47ac79a5cdf30f35ad10033eee8cf39827d35acc5d. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBJSG1930605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c903d790dbcd94152c8045f6a3ba2acfe7c879faa95213ca7e0a142e37d504c. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBJSG1930608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c903d790dbcd94152c8045f6a3ba2acfe7c879faa95213ca7e0a142e37d504c. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T20:19:31Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBJSG1930608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x195c039f7d1b946864c0e0a2ccf7353d66fd49068a0a6970f1bfb88f5194fcd3. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBJSG2139003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30993ba4260a2f5a18d4cce06b325f43701496198160991c8dbb634df3ee88a5. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBJSG2139005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x319b4fda86726f6bb2c02fdf67fc75e7d915f1042dd68c53f1e7dbe6059ee1a9. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBJSG2139006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e6a8890246d5eee9f5ddc3ed5be4af4acca760d6e25e83bc8275f781b01732f. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBJSG2139007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba2f25aef4bd15e1c22831b587896111ca2cd1653ea326841140fd2b18124fd. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBJSG2139008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c1e1d0545605d19002a22b4e9cbccd77ad73eb1de0edbbf776ecf1ef5947af. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBJSG2139010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd465490811da8edaed611f1983ba063aaacfa3d7d9f1e6ef36263d496d63a9d5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBJSG2139011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341d29b93f20283d4a8f5c51b07b6a0021992594b8a5d35009618fcc7cee4a95. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBJSG2139004.